I suppose I’m thinking in a much more “trained” way about the use of dynamics. For example, when a soloist is playing a concerto with an orchestra, a marked mp isn’t really “medium-soft”. It’s relative, so that they can be heard over the orchestra. Dynamics have as much to do with energy as they do with loudness if not more so. Of course, since I’m trained on an instrument (horn) where it is easier to vary loudness without changing energy or energy without loudness, it is probably easier for me to conceive how this might be accomplished than those trained on guitars. I suppose an analogy for electric guitar would be changing the volume but leaving the overdrive on.